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Shepherd R, Angus LM, Mansell T, Arman B, Kim BW, Lange K, Burgner D, Kerr JA, Pang K, Zajac JD, Saffery R, Cheung A, Novakovic B. Impact of Distinct Anti-Androgen Exposures on the Plasma Metabolome in Feminizing Gender-Affirming Hormone Therapy. J Clin Endocrinol Metab 2024:dgae226. [PMID: 38609170 DOI: 10.1210/clinem/dgae226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/06/2024] [Accepted: 04/04/2024] [Indexed: 04/14/2024]
Abstract
CONTEXT The plasma metabolome is a functional readout of metabolic activity and is associated with phenotypes exhibiting sexual dimorphism, such as cardiovascular disease. Sex hormones are thought to play a key role in driving sexual dimorphism. OBJECTIVE Gender-affirming hormone therapy (GAHT) is a cornerstone of transgender care, but longitudinal changes in the plasma metabolome with feminizing GAHT have not been described. METHODS Blood samples were collected at baseline and after three and six months of GAHT from transgender women (n = 53). Participants were randomized to different anti-androgens, cyproterone acetate or spironolactone. NMR-based metabolomics was used to measure 249 metabolic biomarkers in plasma. Additionally, we used metabolic biomarker data from an unrelated cohort of children and their parents (n = 3,748) to identify sex- and age-related metabolite patterns. RESULTS We identified 43 metabolic biomarkers altered after six months in both anti-androgen groups, most belonging to the very low- or low-density lipoprotein subclasses, with all but one showing a decrease. We observed a cyproterone acetate-specific decrease in glutamine, glycine, and alanine levels. Notably, of the metabolic biomarkers exhibiting the most abundant 'sex- and age-related' pattern (higher in assigned female children and lower in assigned female adults, relative to assigned males), 80% were significantly lowered after GAHT, reflecting a shift toward the adult female profile. CONCLUSION Our results suggest an anti-atherogenic signature in the plasma metabolome after the first six months of feminizing GAHT, with cyproterone acetate also reducing specific plasma amino acids. This study provides novel insight into the metabolic changes occurring across feminizing GAHT.
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Affiliation(s)
- Rebecca Shepherd
- Molecular Immunity, Infection and Immunity Theme, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
| | - Lachlan M Angus
- Department of Medicine (Austin Health), The University of Melbourne, Parkville, VIC, Australia
- Department of Endocrinology, Austin Health, Heidelberg, VIC, Australia
| | - Toby Mansell
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
- Inflammatory Origins, Infection and Immunity Theme, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
| | - Bridget Arman
- Therapeutics Discovery and Vascular Function Group, Department of Obstetrics and Gynaecology, University of Melbourne, Mercy Hospital for Women, Heidelberg, Victoria, Australia
- Mercy Perinatal, Mercy Hospital for Women, Heidelberg, Victoria, Australia
- Department of Obstetrics and Gynaecology, University of Melbourne, Mercy Hospital for Women, Heidelberg, Victoria, Australia
| | - Bo Won Kim
- Molecular Immunity, Infection and Immunity Theme, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - Katherine Lange
- The Centre for Community Child Health, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - David Burgner
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
- Inflammatory Origins, Infection and Immunity Theme, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
| | - Jessica A Kerr
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
- University of Otago, Department of Psychological Medicine, Christchurch, New Zealand
- Murdoch Children's Research Institute, Centre for Adolescent Health, Population Health Theme, Parkville, VIC, Australia
- University of Melbourne, Department of Paediatrics, Parkville, VIC, Australia
| | - Ken Pang
- Brain and Mind Research, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
- Department of Adolescent Medicine, Royal Children's Hospital, Parkville, VIC, Australia
| | - Jeffrey D Zajac
- Department of Medicine (Austin Health), The University of Melbourne, Parkville, VIC, Australia
- Department of Endocrinology, Austin Health, Heidelberg, VIC, Australia
| | - Richard Saffery
- Molecular Immunity, Infection and Immunity Theme, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
| | - Ada Cheung
- Department of Medicine (Austin Health), The University of Melbourne, Parkville, VIC, Australia
- Department of Endocrinology, Austin Health, Heidelberg, VIC, Australia
| | - Boris Novakovic
- Molecular Immunity, Infection and Immunity Theme, Murdoch Children's Research Institute, Royal Children's Hospital, Parkville, VIC, Australia
- Department of Paediatrics, The University of Melbourne, Parkville, VIC, Australia
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Kim SH, Choi JH, Kim BW, Kim SH. Twisting of the Ranger drug‐coated balloon for treating superficial femoral artery disease. Clin Case Rep 2022; 10:e05505. [PMID: 35251644 PMCID: PMC8886637 DOI: 10.1002/ccr3.5505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Accepted: 12/22/2021] [Indexed: 11/19/2022] Open
Abstract
Paclitaxel‐coated balloons have demonstrated improved efficacy compared with uncoated percutaneous transluminal angioplasty for femoropopliteal artery disease. While applying a long balloon, twisting of the balloon can be occurred. We reported two cases with twisting of the Ranger drug‐coated balloon for treating superficial femoral artery.
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Affiliation(s)
- Su Hong Kim
- Department of Cardiovascular Medicine Busan Veterans HospitalKorea Veterans Health Service Busan Korea
| | - Jong Hyun Choi
- Department of Cardiovascular Medicine Busan Veterans HospitalKorea Veterans Health Service Busan Korea
| | - Bo Won Kim
- Department of Cardiovascular Medicine Busan Veterans HospitalKorea Veterans Health Service Busan Korea
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Choi JH, Kim SH, Kim BW, Bong U, Sohn CB. Successful management of iatrogenic arterial pseudoaneurysm caused by rotational atherectomy. Cardiovasc Interv Ther 2021; 37:391-392. [PMID: 34117980 DOI: 10.1007/s12928-021-00781-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/22/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Jong Hyun Choi
- Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Korea Veterans Health Service, Busan Veterans Hospital, Baekyang-daero, Busan, 42046996, Korea
| | - Su Hong Kim
- Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Korea Veterans Health Service, Busan Veterans Hospital, Baekyang-daero, Busan, 42046996, Korea.
| | - Bo Won Kim
- Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Korea Veterans Health Service, Busan Veterans Hospital, Baekyang-daero, Busan, 42046996, Korea
| | - Uri Bong
- Division of Cardiology, Department of Internal Medicine, Cardiovascular Center, Korea Veterans Health Service, Busan Veterans Hospital, Baekyang-daero, Busan, 42046996, Korea
| | - Chang-Bae Sohn
- Division of Cardiology, Department of Internal Medicine, Ulsan Medical Center, Ulsan, Korea
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Choi JH, Kim SP, Lee HC, Park TS, Park JH, Kim BW, Ahn J, Park JS, Lee HW, Oh JH, Choi JH, Cha KS, Hong TJ. Clinical outcomes of endovascular treatment for ruptured thoracic aortic disease. Korean J Intern Med 2021; 36:S72-S79. [PMID: 32264656 PMCID: PMC8009169 DOI: 10.3904/kjim.2019.080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 07/15/2019] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND/AIMS Untreated rupture of the thoracic aorta is associated with a high mortality rate. We aimed to review the clinical results of endovascular treatment for ruptured thoracic aortic disease. METHODS We retrospectively reviewed data on 37 patients (mean age, 67.0 ± 15.18 years) treated for ruptured thoracic aortic disease from January 2005 to May 2016. The median follow-up duration was 308 days (interquartile range, 61 to 1,036.5). The primary end-point of the study was the composite of death, secondary intervention, endoleak, and major stroke/paraplegia after endovascular treatment. RESULTS The etiologies of ruptured thoracic aortic disease were aortic dissection (n = 11, 29.7%), intramural hematoma (n = 7, 18.9%), thoracic aortic aneurysm (n = 14, 37.8%), and traumatic aortic transection (n = 5, 13.5%). Three patients died within 24 hours of thoracic endovascular aortic repair, and one showed type I endoleak. The technical success rate was 89.2% (33/37). The in-hospital mortality rate was 13.5% (5/37); no deaths occurred during follow-up. The composite outcome rate during follow-up was 37.8% (14/37), comprising death (n = 5, 13.5%), secondary intervention (n = 5, 13.5%), endoleak (n = 5, 13.5%), and major stroke/paraplegia (n = 3, 8.1%). Left subclavian artery revascularization and proximal landing zone were not associated with the composite outcome. Low mean arterial pressure (MAP; ≤ 60 mmHg, [hazard ratio, 13.018; 95% confidence interval, 2.435 to 69.583, p = 0.003]) was the most significant predictor and high transfusion requirement in the first 24 hours was associated with event-free survival (log rank p = 0.018). CONCLUSION Endovascular treatment achieves high technical success rates and acceptable clinical outcome. High transfusion volume and low MAP were associated with poor clinical outcomes.
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Affiliation(s)
- Jong Hyun Choi
- Division of Cardiology, Department of Internal Medicine, Busan Veterans Hospital, Busan, Korea
| | - Sang-Pil Kim
- Department of Thoracic Surgery, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Han Cheol Lee
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
- Correspondence to Han Cheol Lee, M.D. Division of Cardiology, Department of Internal Medicine, Pusan National University Hospital, 179 Gudeok-ro, Seo-gu, Busan 49241, Korea Tel.: +82-51-240-7217 Fax: +82-51-240-7795 E-mail:
| | - Tae Sik Park
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jong Ha Park
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Bo Won Kim
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jinhee Ahn
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jin Sup Park
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Hye Won Lee
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jun-Hyok Oh
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jung Hyun Choi
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Kwang Soo Cha
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Taek Jong Hong
- Division of Cardiology, Department of Internal Medicine, Medical Research Institute, Pusan National University Hospital, Busan, Korea
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Park MY, Kim BW, Moehrle M, Troppenz U, Rehbein W, Sigmund A, Hong SJ. Liquid crystal filter based tunable transmitter for 25Gps wavelength division multiplexing-passive optical network fronthaul. Opt Express 2020; 28:38942-38948. [PMID: 33379452 DOI: 10.1364/oe.411907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 11/29/2020] [Indexed: 06/12/2023]
Abstract
A novel tunable transmitter structure based on liquid crystal filter, to the best of our knowledge, is presented. The structure is designed for application to 5G fronthaul and supports 25 Gbps dense wavelength division multiplexing (WDM) transmission and tunable range of 35 nm. The design takes into account easy change of operation band over coarse WDM grid. Prototype samples are developed to test feasibility of the design.
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Ahn HS, Kim BW, Park Y, Ki M. Trends of sarcopenia and physical activity in elderly Koreans using KNHANES 2007-2017. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz187.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Sarcopenia is one of risk factors for prevalence of chronic diseases which is associated with aging. Distribution of sarcopenia in Korea is important because Korea is one of the most rapid countries in population aging. This study aimed to understand trends in PA in elderly Koreans (≥65 years of age) and identify the proportion of sarcopenia in elderly Koreans based on a reference cutoff value of handgrip strength (28.6kg for men and 16.4kg for women).
Methods
This study was performed using data from Korea National Health and Nutrition Examination Survey (KNHANES) between 2007-2017. Physical activity on walking (2007-2017), aerobic exercise (2014-2017), and muscle strength (2007-2017) were analyzed to understand trends of physical activity participation in elderly Koreans. Furthermore, using handgrip strength data from KNHANES (2014-2017), the study examined how sarcopenia has distributed in elderly in Korea.
Results
The proportion of elderly Koreans engaged in walking decreased from 46.8% (age standardized) in 2007 to 35.7% in 2017, and the proportion of elderly Koreans engaged in aerobic exercise decreased 41.1% in 2014 to 29.4% in 2017. Even though, the proportion of elderly Koreans engaged in muscle strength increased from 11.6% in 2007 to 17.5% in 2017, the proportion of sarcopenia in elderly men increased from 22.6% in 2014 to 29.3% in 2017 and the proportion of sarcopenia in elderly women increased from 19.3% in 2014 to 30.1% in 2017.
Conclusions
During the past 10 years, the participation in muscle strength has increased, while the participation in walking and aerobic exercise has decreased in elderly Koreans. Nevertheless, the proportion of sarcopenia in elderly Koreans has increased. This analysis provides evidence of necessity of public health efforts to implement sarcopenia reduction interventions and examine the correlation between sarcopenia and physical activity pattern in elderly Koreans.
Key messages
Although the participation of physical activity has decreased, the participation of muscle strength has increased in elderly Koreans (≥65 years of age). The increased proportion of sarcopenia in elderly Koreans showed the necessity of new public health intervention to reduce sarcopenia in spite of growing trends of muscle strength in elderly Koreans.
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Affiliation(s)
- H S Ahn
- Cancer Control and Population Health, Graduate School of Cancer Science and Policy, National Cancer Center Korea, Goyang-si, Gyeonggi-do, South Korea
| | - B W Kim
- Cancer Control and Population Health, Graduate School of Cancer Science and Policy, National Cancer Center Korea, Goyang-si, Gyeonggi-do, South Korea
| | - Y Park
- Cancer Control and Population Health, Graduate School of Cancer Science and Policy, National Cancer Center Korea, Goyang-si, Gyeonggi-do, South Korea
| | - Moran Ki
- Cancer Control and Population Health, Graduate School of Cancer Science and Policy, National Cancer Center Korea, Goyang-si, Gyeonggi-do, South Korea
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7
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Park JS, Kim BW, Hong TJ, Choe JC, Lee HW, Oh JH, Choi JH, Lee HC, Cha KS, Jeong MH. Lower In-Hospital Ventricular Tachyarrhythmia in Patients With Acute Myocardial Infarction Receiving Prior Statin Therapy. Angiology 2018; 69:892-899. [PMID: 29758993 DOI: 10.1177/0003319718775902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We evaluated whether prior statin therapy reduces in-hospital ventricular tachycardia/ventricular fibrillation (VT/VF) in percutaneous coronary intervention (PCI) patients with acute myocardial infarction (MI). Among the 1177 patients from the Acute Myocardial Infarction Registry-National Institutes of Health (KAMIR-NIH), 823 (70%) patients received prior statin therapy. Prior statin therapy was associated with a reduced risk of VT/VF events in both adjusted propensity score analysis (odds ratio [OR] 0.414, 95% confidence interval [CI], 0.198-0.865, P = .019) and adjusted inverse probability of treatment weight analysis (OR 0.463, 95% CI, 0.216-0.994, P = .048). The risk of in-hospital death did not differ significantly between those with or without prior statin therapy (hazard ratio [HR] 0.416, 95% CI, 0.112-1.548, P = .191). Major adverse cardiac events occurred in 116 (8.9%) patients during follow-up. Prior statin therapy was associated with a lower risk of major adverse cardiac events during the follow-up period (HR 0.486, 95% CI, 0.243-0.974, P = .042); however, this was mainly driven by reduced noncardiac death. Prior statin therapy might reduce the incidence of serious cardiac tachyarrhythmia, such as VT/VF, in patients with MI undergoing PCI. However, the reduction in VT/VF due to prior statin therapy did not improve short- and long-term clinical outcomes.
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Affiliation(s)
- Jin Sup Park
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Bo Won Kim
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Taek Jong Hong
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Jeong Cheon Choe
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Hye Won Lee
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Jun-Hyok Oh
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Jung Hyun Choi
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Han Cheol Lee
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Kwang Soo Cha
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Myung Ho Jeong
- 2 Department of Cardiology, Chonnam National University Hospital, Gwangju, South Korea
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Ghassemi Nejad J, Sung KI, Lee BH, Peng JL, Kim JY, Chemere B, Oh SM, Kim MJ, Kim SC, Kim BW. 3 Comparison of hair cortisol levels and body temperature response prior to and post heat stress and water deprivation in Holstein dairy cows. J Anim Sci 2018. [DOI: 10.1093/jas/sky073.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- J Ghassemi Nejad
- Institute of Animal Resources, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - K I Sung
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - B H Lee
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - J L Peng
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - J Y Kim
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - B Chemere
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - S M Oh
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - M J Kim
- Institute of Animal Resources, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - S C Kim
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea, Republic of (South)
| | - B W Kim
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea, Republic of (South)
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Hong TJ, Kim BW, Lee HW, Choi JC, Ahn J, Park JS, Choi JH, Oh JH, Lee HC, Cha KS. Comparable outcomes of intravascular ultrasound or optical coherence tomography-assisted percutaneous coronary intervention. Atherosclerosis 2017. [DOI: 10.1016/j.atherosclerosis.2017.06.493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Saha SK, Choi HY, Kim BW, Dayem AA, Yang GM, Kim KS, Yin YF, Cho SG. KRT19 directly interacts with β-catenin/RAC1 complex to regulate NUMB-dependent NOTCH signaling pathway and breast cancer properties. Oncogene 2017; 36:332-349. [PMID: 27345400 PMCID: PMC5270332 DOI: 10.1038/onc.2016.221] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 04/19/2016] [Accepted: 05/15/2016] [Indexed: 12/21/2022]
Abstract
Studies have reported that interactions between keratins (KRTs) and other proteins initiate signaling cascades that regulate cell migration, invasion, and metastasis. In the current study, we found that expression of KRT19 was specifically high in breast cancers and significantly correlated with their invasiveness. Moreover, knockdown of KRT19 led to increased proliferation, migration, invasion, drug resistance, and sphere formation in breast cancer cells via an upregulated NOTCH signaling pathway. This was owing to reduced expression of NUMB, an inhibitory protein of the NOTCH signaling pathway. In addition, we found that KRT19 interacts with β-catenin/RAC1 complex and enhances the nuclear translocation of β-catenin. Concordantly, knockdown of KRT19 suppressed the nuclear translocation of β-catenin as well as β-catenin-mediated NUMB expression. Furthermore, modulation of KRT19-mediated regulation of NUMB and NOTCH1 expression led to the repression of the cancer stem cell properties of breast cancer patient-derived CD133high/CXCR4high/ALDH1high cancer stem-like cells (CSLCs), which showed very low KRT19 and high NOTCH1 expression. Taken together, our study suggests a novel function for KRT19 in the regulation of nuclear import of the β-catenin/RAC1 complex, thus modulating the NUMB-dependent NOTCH signaling pathway in breast cancers and CSLCs, which might bear potential clinical implications for cancer or CSLC treatment.
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Affiliation(s)
- S K Saha
- Department of Animal Biotechnology, Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, Republic of Korea
| | - H Y Choi
- Department of Animal Biotechnology, Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, Republic of Korea
| | - B W Kim
- Department of Animal Biotechnology, Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, Republic of Korea
| | - A A Dayem
- Department of Animal Biotechnology, Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, Republic of Korea
| | - G-M Yang
- Department of Animal Biotechnology, Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, Republic of Korea
| | - K S Kim
- Department of Animal Biotechnology, Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, Republic of Korea
| | - Y F Yin
- Department of Animal Biotechnology, Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, Republic of Korea
| | - S-G Cho
- Department of Animal Biotechnology, Stem Cell & Regenerative Biotechnology and Incurable Disease Animal Model & Stem Cell Institute (IDASI), Konkuk University, Seoul, Republic of Korea
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Choe JC, Cha KS, Jang HY, Choi JH, Kim BW, Ahn J, Park JS, Lee HW, Oh JH, Choi JH, Lee HC, Hong TJ, Ahn Y, Jeong MH. Outcomes of Acute Myocardial Infarction Patients Implanted With Biodegradable Polymer Biolimus-Eluting Stents Versus New-Generation Durable Polymer Drug-Eluting Stents: A Retrospective Analysis. Angiology 2016; 68:698-706. [PMID: 27872316 DOI: 10.1177/0003319716679339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We compared outcomes between biodegradable polymer biolimus-eluting stent (BP-BES) and new-generation durable polymer drug-eluting stent (DP-DES) implantations in patients with acute myocardial infarction (MI). Among 13472 patients with acute MI in a nationwide registry, 557 (64.8%) were in the BP-BES and 303 (35.2%) in the new-generation DP-DES group following coronary reperfusion. The occurrence of major adverse cardiac events (MACE; death, MI, revascularization) and stent thrombosis was compared. Major adverse cardiac events occurred in 53 (6.2%) patients and showed similar rates between the BP-BES and new-generation DP-DES groups (all: 6.6% vs 5.9%, P = .652; propensity score [PS] matched: n = 380, 6.3% vs 5.3%, P = .623). Stent thrombosis did not differ between groups (all: 0.3% vs 0.4%, P = .892; PS matched: 0.5% vs 0.5%, P = 1.000). Major adverse cardiac event-free survival was comparable between groups (all: 93.4% vs 94.1%, log-rank P = .357; PS matched: 93.7% vs 94.7%, log-rank P = .445). Biodegradable polymer biolimus-eluting stent was not associated with MACE (all: hazard ratio [HR], 1.67; 95% confidence interval [CI], 0.75-3.74; P = 0.212; PS matched: HR, 1.05; 95% CI, 0.40-2.75; P = .915). In conclusion, in patients with acute MI, BP-BES was equivalent to the new-generation DP-DES in terms of outcomes.
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Affiliation(s)
- Jeong Cheon Choe
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Kwang Soo Cha
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Hye Yoon Jang
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Jong Hyun Choi
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Bo Won Kim
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Jinhee Ahn
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Jin Sup Park
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Hye Won Lee
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Jun-Hyok Oh
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Jung Hyun Choi
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Han Cheol Lee
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Taek Jong Hong
- 1 Department of Cardiology and Medical Research Institute, Pusan National University Hospital, Busan, South Korea
| | - Youngkeun Ahn
- 2 Department of Cardiology, Chonnam National University Hospital, Gwangju, South Korea
| | - Myung Ho Jeong
- 2 Department of Cardiology, Chonnam National University Hospital, Gwangju, South Korea
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Choe JC, Cha KS, Choi JH, Kim BW, Park JS, Lee HW, Oh JH, Choi JH, Lee HC, Hong TJ, Youn YJ, Lee SH, Cho BR, Kim DI, Han KR, Jeong MH, Yoon J. Comparison of Frequency of Bleeding and Major Adverse Cardiac Events After Transradial Versus Transfemoral Intervention in the Recent Antiplatelet Era. Am J Cardiol 2016; 117:1588-1595. [PMID: 27026640 DOI: 10.1016/j.amjcard.2016.02.033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 02/16/2016] [Accepted: 02/16/2016] [Indexed: 10/22/2022]
Abstract
The transradial approach is increasingly used for percutaneous coronary intervention (PCI), and we therefore aimed to compare the clinical outcomes after transradial intervention (TRI) and transfemoral intervention (TFI) in all patients undergoing PCI. Among 6,973 patients enrolled in a nationwide, prospective, multicenter registry (February 2013 to September 2013), 1,860 underwent TRI (n = 1,445, 77.7%) and TFI (n = 415, 22.3%). Bleeding and major adverse cardiac events (MACE; death, myocardial infarction, revascularization, or stent thrombosis) were compared. Bleeding occurred in 42 patients (2.3%) and was significantly less likely in the TRI versus TFI group (overall cohort: 1.5% vs 4.8%, p = 0.001; propensity score-matched: n = 728, 2.7% vs 5.2%, p = 0.048). Multivariate regression revealed that TRI was negatively associated with bleeding (odds ratio 0.42, 95% CI 0.21 to 0.83, p = 0.013). MACE occurred in 152 patients (8.2%). Kaplan-Meier estimates showed higher MACE-free survival rates in the TRI versus TFI group (overall cohort: 93.3% vs 86.7%, log-rank p = 0.026; propensity score-matched: 91.8% vs 86.5%, log-rank p = 0.04). Cox proportional analysis demonstrated that TRI independently predicted improved MACE (hazard ratio 0.64, 95% CI 0.43 to 0.91, p = 0.024). In conclusion, TRI is associated with reduced bleeding rates and better clinical outcomes than TFI in all patients undergoing PCI.
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Kim BW, Lee HC, Choi JH, Park JS, Lee HW, Oh JH, Cha KS, Hong TJ. TCTAP A-034 Endovascular Treatment in the Complicated Type B Aortic Dissection and Malperfusion Syndrome. J Am Coll Cardiol 2016. [DOI: 10.1016/j.jacc.2016.03.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kim BW, Lee HC, Choi JH, Park JS, Lee HW, Oh JH, Cha KS, Hong TJ. TCTAP C-176 The Chimney Technique with a Thoracic Aortic Stent Graft to Restore Blood Flow of Left Common Carotid Artery via Left Subclavian Artery for Treating Rupture of Thoracic Aortic Aneurysm. J Am Coll Cardiol 2016. [DOI: 10.1016/j.jacc.2016.03.387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kim BW, Cha KS, Park MJ, Choi JH, Yun EY, Park JS, Lee HW, Oh JH, Kim JS, Choi JH, Park YH, Lee HC, Kim JH, Chun KJ, Hong TJ, Ahn Y, Jeong MH. The impact of transferring patients with ST-segment elevation myocardial infarction to percutaneous coronary intervention-capable hospitals on clinical outcomes. Cardiol J 2016; 23:289-95. [PMID: 26779970 DOI: 10.5603/cj.a2016.0003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Accepted: 12/07/2015] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Primary percutaneous coronary intervention (PCI) is recommended for ST-segment elevation myocardial infarction (STEMI) patients even when the patient must be transported to a PCI-capable hospital. This study aimed to evaluate the long-term clinical outcomes of STEMI patients who were transferred for primary PCI compared to patients who arrived directly to PCI-capable hospitals. METHODS A total of 3,576 STEMI patients with less than 12 h of symptom onset-to-door time from the Korea Acute Myocardial Infarction Registry were divided into transfer (n = 2,176) and direct-arrival (n = 1,400) groups according to their status. The primary outcome was the composite of major adverse cardiac event (MACE), defined as death, non-fatal myocardial infarction, and revascularization at 1 year. RESULTS In the transfer vs. the direct-arrival group, the median symptom onset-to-firstmedical contact time was significantly shorter (60 vs. 80 min, p < 0.001), but the median symptom onset-to-door time was significantly longer (194 vs. 90 min, p < 0.001). The median door-to-balloon time was significantly shorter in the transfer group vs. the direct-arrival group (75 vs. 91 min, p < 0.001). Total death and the composite of MACE were not significantly different during hospitalization (5.1 vs. 3.9%, p = 0.980; 5.4 vs. 4.8%, p = 0.435, respectively) and at 1-year (8.2 vs. 6.6%, p = 0.075; 13.7 vs. 13.9%, p = 0.922, respectively). CONCLUSIONS Transferring STEMI patients to PCI-capable hospitals with a time delay did not affect clinical outcomes after 1 year. This study suggests that inter-hospital transfer should be encouraged even with delay for STEMI patients who require primary PCI in areas with a similar geographic accessibility.
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Affiliation(s)
| | - Kwang Soo Cha
- Pusan National University Hospital, Busan, South Korea.
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Lee HW, Lee HC, Park JH, Kim BW, Ahn J, Kim JH, Park JS, Oh JH, Choi JH, Cha KS, Hong TJ, Park TS, Kim SP, Song S, Kim JY, Park MH, Jung JS. Effects of Intracoronary Administration of Autologous Adipose Tissue-Derived Stem Cells on Acute Myocardial Infarction in a Porcine Model. Yonsei Med J 2015; 56:1522-9. [PMID: 26446632 PMCID: PMC4630038 DOI: 10.3349/ymj.2015.56.6.1522] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 12/23/2014] [Accepted: 02/03/2015] [Indexed: 11/27/2022] Open
Abstract
PURPOSE Adipose-derived stem cells (ADSCs) are known to be potentially effective in regeneration of damaged tissue. We aimed to assess the effectiveness of intracoronary administration of ADSCs in reducing the infarction area and improving function after acute transmural myocardial infarction (MI) in a porcine model. MATERIALS AND METHODS ADSCs were obtained from each pig's abdominal subcutaneous fat tissue by simple liposuction. After 3 passages of 14-days culture, 2 million ADSCs were injected into the coronary artery 30 min after acute transmural MI. At baseline and 4 weeks after the ADSC injection, 99mTc methoxyisobutylisonitrile-single photon emission computed tomography (MIBISPECT) was performed to evaluate the left ventricular volume, left ventricular ejection fraction (LVEF; %), and perfusion defects as well as the myocardial salvage (%) and salvage index. At 4 weeks, each pig was sacrificed, and the heart was extracted and dissected. Gross and microscopic analyses with specific immunohistochemistry staining were then performed. RESULTS Analysis showed improvement in the perfusion defect, but not in the LVEF in the ADSC group (n=14), compared with the control group (n=14) (perfusion defect, -13.0±10.0 vs. -2.6±12.0, p=0.019; LVEF, -8.0±15.4 vs. -15.9±14.8, p=0.181). There was a tendency of reducing left ventricular volume in ADSC group. The ADSCs identified by stromal cell-derived factor-1 (SDF-1) staining were well co-localized by von Willebrand factor and Troponin T staining. CONCLUSION Intracoronary injection of cultured ADSCs improved myocardial perfusion in this porcine acute transmural MI model.
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Affiliation(s)
- Hye Won Lee
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Han Cheol Lee
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
- Division of Cardiology, Pusan National University Hospital, Busan, Korea.
| | - Jong Ha Park
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Bo Won Kim
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
| | - Jinhee Ahn
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
| | - Jin Hee Kim
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
| | - Jin Sup Park
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jun-Hyok Oh
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Jung Hyun Choi
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Kwang Soo Cha
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Taek Jong Hong
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Tae Sik Park
- Division of Cardiology, Pusan National University Hospital, Busan, Korea
| | - Sang-Pil Kim
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
- Division of Thoracic Surgery, Pusan National University Hospital, Busan, Korea
| | - Seunghwan Song
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
- Division of Thoracic Surgery, Pusan National University Hospital, Busan, Korea
| | - Ji Yeon Kim
- Division of Pathology, Pusan National University Hospital, Busan, Korea
| | - Mi Hwa Park
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
- Division of Pathology, Pusan National University Hospital, Busan, Korea
| | - Jin Sup Jung
- Medical Research Institute, Pusan National University Hospital, Busan, Korea
- Division of Physiology, Pusan National University Hospital, Busan, Korea
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Choi JC, Cha KS, Choi JH, Kim BW, Park JS, Lee HW, Oh JH, Choi JH, Lee HC, Hong TJ, Youn YJ, Lee SH, Yoon J, Han KR, Cheong SS, Cho BR, Bae JH, Rha SW, Cho YH, Lee JB, Kim HY, Seo JS, Hyon MS, Choi JW, Park KS, Jeong MH, Kim SW, Lee JH, Her SH, Kim KS, Kim DI. COMPARISON OF CLINICAL OUTCOMES AFTER TRANSRADIAL AND TRANSFEMORAL INTERVENTIONS IN CONTEMPORARY ANTIPLATELET ERA: A PROPENSITY SCORE-MATCHED ANALYSIS. J Am Coll Cardiol 2015. [DOI: 10.1016/s0735-1097(15)60201-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Chung SY, Venkatramanan S, Park N, Rajesh R, Ramkumar T, Kim BW. An assessment of selected hydrochemical parameter trend of the Nakdong River water in South Korea, using time series analyses and PCA. Environ Monit Assess 2015; 187:4192. [PMID: 25519872 DOI: 10.1007/s10661-014-4192-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 11/19/2014] [Indexed: 06/04/2023]
Abstract
Time series analyses (autocorrelation, spectral density, and cross-correlation) and principal component analysis (PCA) were used to understand the characteristics of the selected hydrochemical parameters pH, turbidity, alkalinity, Cl, hardness, total dissolved solids (TDS), and metals Fe and Mn in the Nakdong River, South Korea. Autocorrelation and spectral density for pH, alkalinity, hardness, and Cl were very similar to TDS, whereas Fe, Mn, and turbidity showed different trends from TDS. Cross-correlograms of pH, alkalinity, hardness, and Cl versus TDS were very similar to each other. Those of Fe and turbidity represented the opposite relations with other components. Cross-correlation coefficients had the highest values at zero lag, indicating that pH, alkalinity, hardness, and Cl are controlling factors for TDS. On the other hand, Fe and turbidity showed the highest values at 6-month lag and Mn at a month lag. PCA indicated that TDS had very close relation with hardness, pH, and Cl and very small relation with Mn. Turbidity and Fe had relatively opposite relations with TDS. It was concluded that the geostatistical methods were very useful for evaluating the hydrochemical characteristics of the Nakdong River water in South Korea.
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Affiliation(s)
- S Y Chung
- Department of Earth & Environmental Sciences, Institute of Environmental Geosciences, Pukyong National University, 599-1 Daeyeon-dong Nam-gu, Busan, 608-737, South Korea,
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Lee JN, Kim BS, Kim HT, Kim TH, Yoo ES, Choi GS, Kim BW, Kwon TG. Oncologic outcomes of laparoscopic nephroureterectomy for pT3 upper urinary tract urothelial carcinoma. MINERVA UROL NEFROL 2014; 66:157-164. [PMID: 25072130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
AIM We present the oncologic outcomes of laparoscopic nephroureterectomy management of pT3 upper urinary tract urothelial carcinoma. METHODS Between October 2003 and January 2011, 50 patients with pT3 upper urinary tract urothelial carcinoma which had pathologically confirmed underwent laparoscopic nephroureterectomy at our institution. Demographic data, perioperative results, pathological findings and oncologic outcomes were reviewed and analyzed retrospectively. RESULTS There were 36 patients (72%) of high grade lesion and 14 patients (28%) of low grade lesion. Lymphovascular invasion was observed in 16 patients (32%) and the surgical margin was positive in one patient. N stage was pN0 in 16 (32%), pN1 in 3 (6%), pN2 in 1 (2%) and pN3 in 1 (2%). The 5-year overall survival rate was 52.6% and the 5-year cancer-specific survival rate was 65.3%. Overall recurrence developed in 23 patients. There were 10 patients (20%) of urothelial recurrence which were all occurred in the bladder at the mean period of 13.6 months, and 7 patients of them were invasive bladder cancer. There were 16 patients (32%) of non-urothelial recurrence developed at the mean period of 9.69 months. On multivariate analyses lymphadenopathy and lymph node involvement of cancer (N+) were identified as independent predictive factors for the cancer-specific survival, and concomitant bladder tumor, grade and lymphovascular invasion were identified as independent predictive factors for the overall recurrence free survival. CONCLUSION Laparoscopic nephroureterectomy in patients with high stage upper urinary tract urothelial carcinoma appear comparable to those of open surgery in the regard of oncologic outcomes.
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Affiliation(s)
- J N Lee
- Department of Urology School of Medicine Kyungpook National University, Daegu, Korea -
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Park SY, Kim J, Kim BW, Wang HJ, Kim SS, Cheong JY, Cho SW, Won JH. Embolization of percutaneous transhepatic portal venous access tract with N-butyl cyanoacrylate. Br J Radiol 2014; 87:20140347. [PMID: 25027034 PMCID: PMC4453156 DOI: 10.1259/bjr.20140347] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2014] [Revised: 07/07/2014] [Accepted: 07/14/2014] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVE To evaluate the safety and feasibility of N-butyl cyanoacrylate (N-BCA) embolization of percutaneous transhepatic portal venous access tract and to establish an appropriate technique. METHODS 40 consecutive patients underwent percutaneous transhepatic portal venous intervention for various reasons. Embolization of percutaneous transhepatic portal venous access tract was performed after the procedure in all of the patients using N-BCA and Lipiodol® (Lipiodol Ultra Fluide; Laboratoire Guerbet, Aulnay-sous-Bois, France) mixture. Immediate ultrasonography and fluoroscopy were performed to evaluate perihepatic haematoma formation and unintended embolization of more than one segmental portal vein. Follow-up CT was performed, and haemoglobin and haematocrit levels were checked to evaluate the presence of bleeding. RESULTS Immediate haemostasis was achieved in all of the patients, without development of perihepatic haematoma or unintended embolization of more than one segmental portal vein. Complete embolization of percutaneous access tract was confirmed in 39 out of 40 patients by CT. Seven patients showed decreased haemoglobin and haematocrit levels. Other complications included mild pain at the site of embolization and mild fever, which resolved after conservative management. 16 patients died during the follow-up period owing to progression of the underlying disease. CONCLUSION Embolization of percutaneous transhepatic portal vein access tract with N-BCA is feasible and technically safe. With the appropriate technique, N-BCA can be safely used as an alternate embolic material since it is easy to use and inexpensive compared with other embolic materials. ADVANCES IN KNOWLEDGE This is the first study to investigate the efficacy of N-BCA for percutaneous transhepatic portal venous access tract embolization.
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Affiliation(s)
- S Y Park
- 1 Department of Radiology, Ajou University School of Medicine, Suwon, Republic of Korea
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Hur SJ, Jeong TC, Kim GD, Jeong JY, Cho IC, Lim HT, Kim BW, Joo ST. Comparison of live performance and meat quality parameter of cross bred (korean native black pig and landrace) pigs with different coat colors. Asian-Australas J Anim Sci 2014; 26:1047-53. [PMID: 25049884 PMCID: PMC4093497 DOI: 10.5713/ajas.2013.13005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/02/2013] [Revised: 04/02/2013] [Accepted: 01/07/2013] [Indexed: 11/27/2022]
Abstract
Five hundred and forty crossbred (Korean native black pig×Landrace) F2 were selected at a commercial pig farm and then divided into six different coat color groups: (A: Black, B: White, C: Red, D: White spot in black, E: Black spot in white, F: Black spot in red). Birth weight, 21st d weight, 140th d weight and carcass weight varied among the different coat color groups. D group (white spot in black coat) showed a significantly higher body weight at each weigh (birth weight, 140th d weight and carcass weight) than did the other groups, whereas the C group (red coat color) showed a significantly lower body weight at finishing stage (140th d weight and carcass weight) compared to other groups. Meat quality characteristics, shear force, cooking loss and meat color were not significantly different among the different coat color groups, whereas drip loss was significantly higher in F than in other groups. Most blood characteristics were not significantly different among the different groups, except for the red blood cells.
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Affiliation(s)
- S J Hur
- Department of Bioresources and Food Science, Konkuk University, Seoul 143-701, Korea
| | - T C Jeong
- Department of Bioresources and Food Science, Konkuk University, Seoul 143-701, Korea
| | - G D Kim
- Department of Bioresources and Food Science, Konkuk University, Seoul 143-701, Korea
| | - J Y Jeong
- Department of Bioresources and Food Science, Konkuk University, Seoul 143-701, Korea
| | - I C Cho
- Department of Bioresources and Food Science, Konkuk University, Seoul 143-701, Korea
| | - H T Lim
- Department of Bioresources and Food Science, Konkuk University, Seoul 143-701, Korea
| | - B W Kim
- Department of Bioresources and Food Science, Konkuk University, Seoul 143-701, Korea
| | - S T Joo
- Department of Bioresources and Food Science, Konkuk University, Seoul 143-701, Korea
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Lee HW, Lee HC, Kim BW, Yang MJ, Park JS, Oh JH, Choi JH, Cha KS, Hong TJ, Kim SP, Song S, Park JH. Effects of low dose pioglitazone on restenosis and coronary atherosclerosis in diabetic patients undergoing drug eluting stent implantation. Yonsei Med J 2013; 54:1313-20. [PMID: 24142633 PMCID: PMC3809876 DOI: 10.3349/ymj.2013.54.6.1313] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
PURPOSE Thiazolidinediones are insulin-sensitizing agents that reduce neointimal proliferation and the adverse clinical outcomes associated with percutaneous coronary intervention (PCI) in patients with diabetes mellitus (DM). There is little data on whether or not low dose pioglitazone reduces adverse clinical outcomes. MATERIALS AND METHODS The study population included 121 DM patients with coronary artery disease and they were randomly assigned to 60 patients taking 15 mg of pioglitazone daily in addition to their diabetic medications and 61 patients with placebo after the index procedure with drug-eluting stents (DESs). The primary end points were rate of in-stent restenosis (ISR) and change in atheroma volume and in-stent neointimal volume. The secondary end points were all-cause death, myocardial infarction (MI), stent thrombosis and re-PCI. RESULTS There were no statistical differences in the clinical outcomes and the rate of ISR between the two groups [all-cause death; n=0 (0%) in the pioglitazone group vs. n=1 (1.6%) in the control group, p=0.504, MI; n=2 (3.3%) vs. n=1 (1.6%), p=0.465, re-PCI; n=6 (10.0%) vs. n=6 (9.8%), p=0.652, ISR; n=4 (9.3%) vs. n=4 (7.5%), p=1.000, respectively]. There were no differences in changes in neointimal volume, percent neointimal volume, total plaque volume and percent plaque volume between the two groups on intravascular ultrasonography (IVUS) study. CONCLUSION Our study demonstrated that low dose pioglitazone does not reduce rate of ISR, neointimal volume nor atheroma volume in DM patients who have undergone PCI with DESs, despite the limitations of the study.
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Affiliation(s)
- Hye Won Lee
- Division of Cardiology, Department of Internal Medicine, College of Medicine, Pusan National University, 179 Gudeok-ro, Seo-gu, Busan 602-739, Korea.
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Lee KN, Lee HC, Park JS, Kim BW, Cha KS, Kim SP, Lee CW, Kim HK. The modified chimney technique with a thoracic aortic stent graft to preserve the blood flow of the left common carotid artery for treating descending thoracic aortic aneurysm and dissection. Korean Circ J 2012; 42:360-5. [PMID: 22701139 PMCID: PMC3369971 DOI: 10.4070/kcj.2012.42.5.360] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 10/17/2011] [Accepted: 10/25/2011] [Indexed: 12/03/2022] Open
Abstract
While thoracic endovascular aortic repair is an effective treatment option for descending thoracic aorta pathology, it does have limitations. The main limitation is related to the anatomical difficulties when disease involves the aortic arch. A fenestrated, branched aortic stent graft and hybrid operation has been introduced to overcome this limitation, but it is a custom-made device and is time consuming to manufacture. Furthermore, these devices cannot be used in an emergency setting. We report two patients with massive descending thoracic aortic aneurysm and ruptured aortic dissection very near the aortic arch who underwent a procedure which we named the modified chimney technique. The modified chimney technique can be used as a treatment option in such an emergency situation or as a rescue procedure when aortic pathology is involved near the supra-aortic vessels.
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Affiliation(s)
- Kyung Nam Lee
- Department of Cardiology, Pusan National University College of Medicine, Busan, Korea
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Yang YX, Guo J, Jin Z, Yoon SY, Choi JY, Wang MH, Piao XS, Kim BW, Chae BJ. Lysine restriction and realimentation affected growth, blood profiles and expression of genes related to protein and fat metabolism in weaned pigs. J Anim Physiol Anim Nutr (Berl) 2011; 93:732-43. [PMID: 19138351 DOI: 10.1111/j.1439-0396.2008.00863.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To investigate the effects of lysine restriction and subsequent realimentation on growth performance, blood profiles and gene expression of leptin and myostatin, 128 weaned pigs [initial body weight (BW) 6.96 ± 1.07 kg, 26 ± 2 days of age] were randomly allotted to four treatments. The starter diets during the first 2 weeks (P1) contained 100%, 80%, 70% or 60% of recommended lysine levels (National Research Council, 1998). Then, common grower 1 and 2 diets were offered for 2 weeks (P2 and P3) each. During P1, average daily gain (ADG) was linearly reduced (p < 0.05) with the increasing levels of lysine restriction. Growth rate was greater in pigs previously fed lysine-restricted diets than well-fed pigs although it did not reach a significant level during realimentation. However, the final BW and overall ADG were the lowest (p < 0.05) and F/G was poor in pigs fed 60% lysine diet. Relative visceral organ weights and composition of skeletal muscle were similar (p > 0.05) among the treatment. Blood triglyceride and glucose levels were increased (p < 0.05) during P1, while blood urine nitrogen, total protein and albumin levels were decreased (p < 0.05) during P2 with the reduction in dietary lysine levels. The abundance of myostatin mRNA in skeletal muscle and leptin mRNA in subcutaneous adipose tissue were lower (p < 0.05) in lysine-restricted pigs than in pigs fed non-restricted diets. In conclusion, 80% and 70% lysine restriction of starter diets resulted in inferior growth and compensatory growth effect was noted during realimentation, while 60% lysine restriction had a negative influence on growth performance. Moreover, the changes in myostatin and leptin mRNA abundance caused by nutritional manipulations may be involved in the regulation of protein and fat deposition in young pigs.
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Affiliation(s)
- Y X Yang
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Korea
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Lim HT, Zhong T, Cho IC, Seo BY, Kim JH, Lee SS, Ko MS, Park HB, Kim BW, Lee JH, Jeon JT. Novel alternative splicing by exon skipping in KIT associated with whole-body roan in an intercrossed population of Landrace and Korean Native pigs. Anim Genet 2011; 42:451-5. [PMID: 21749430 DOI: 10.1111/j.1365-2052.2011.02225.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The KIT locus has been suggested to be a strong candidate region linked with whole-body roan in the F(2) population produced by intercrosses between Landrace and Korean Native pigs. In this manuscript, we report the finding of a novel alternative splicing event in the porcine KIT gene that results in the skipping of exon 5 in the I(Rn) allele. KIT mRNAs that lack exon 5 were identified in the large intestine and skin, suggesting that the mechanism responsible for the skipping of exon 5 may be tissue specific. A U(26) repeat in intron 5 showed complete linkage (LOD = 11.8) with the roan phenotype and absolute association with the black phenotype of the Korean Native pig (KNP) population samples, inferring that the repeat pattern may alter the complementary base-pairing-mediated looping-out of introns 4 and 5, which may mediate the exon 5-skipping event. Although the sample size in our study was relatively small, we speculate that the R3 allele containing the U(26) repeat is a causative element for the roan phenotype via alternative control of the exon skipping in our roan pedigree.
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Affiliation(s)
- H T Lim
- Division of Applied Life Science, BK21 Program, Graduate School of Gyeongsang National University, Jinju, Korea. s_htim @gnu.ac.kr
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Ha DW, Kim GH, Kim DU, Bae MJ, Kim BW, Jeon HK, Park DY, Seo HI. A Case of a Neuroendocrine Carcinoma in the Minor Papilla. Korean J Gastroenterol 2011; 58:144-8. [DOI: 10.4166/kjg.2011.58.3.144] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Dong Woo Ha
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Gwang Ha Kim
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Dong Uk Kim
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Min Jung Bae
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Bo Won Kim
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Hye Kyung Jeon
- Department of Internal Medicine, Pusan National University School of Medicine, Busan, Korea
| | - Do Yun Park
- Department of Pathology, Pusan National University School of Medicine, Busan, Korea
| | - Hyung Il Seo
- Department of Surgery, Pusan National University School of Medicine, Busan, Korea
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Kim BW, Bae BK, Lee JM, Won JH, Park YK, Xu WG, Wang HJ, Kim MW. Duct-to-duct biliary reconstructions and complications in 100 living donor liver transplantations. Transplant Proc 2009; 41:1749-55. [PMID: 19545721 DOI: 10.1016/j.transproceed.2009.02.097] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2008] [Accepted: 02/23/2009] [Indexed: 02/07/2023]
Abstract
OBJECTIVE We evaluated the risk factors for biliary complications and surgical procedures for duct-to-duct reconstructions in adult living donor liver transplantation (LDLT). PATIENTS AND METHODS From February 2005 to March 2008, we performed 100 cases of adult LDLT with duct-to-duct biliary reconstruction, using 64 right lobe grafts, 33 left lobe grafts, and 3 right lateral grafts. We employed 4 types of duct-to-duct procedures: all interrupted 6-0 Prolene suture (group 1, n = 9); continuous posterior and interrupted anterior wall 6-0 Prolene suture (group 2, n = 49); all continuous 7-0 Prolene suture (group 3, n = 26); and all continuous 7-0 Prolene suture with external stent (group 4, n = 16). Biliary complications were defined as an anastomosis stricture or a leakage. RESULTS Thirty-four patients experienced biliary complications during the follow-up period (median, 27 months). The incidence of stricture was 27% and that of leakage, 8%. There were no perioperative, intraoperative, or anatomic risk factors for biliary complications, except the type of duct-to-duct procedure. Group 1 and 2 patients showed higher incidences of biliary strictures than groups 3 and 4 (43.1% vs 4.7%; P = .00). Group 3 patients experienced a higher incidence of bile leakage than the other groups (23.1% vs 2.7%; P = .004). CONCLUSIONS The type of biliary reconstruction is a factor affecting biliary complications following duct-to-duct anastomosis in LDLT. Duct-to-duct biliary anastomosis with 7-0 monofilament suture and a small external stent is a feasible procedure in LDLT that significantly reduces the incidence of biliary complications.
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Affiliation(s)
- B W Kim
- Department of Surgery, Ajou University School of Medicine, Suwon, Korea
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Hwangbo J, Hong EC, Jang A, Kang HK, Oh JS, Kim BW, Park BS. Utilization of house fly-maggots, a feed supplement in the production of broiler chickens. J Environ Biol 2009; 30:609-614. [PMID: 20120505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Recent studies have suggested the utilization of maggots as a feed supplement forenhanced broiler performance. Maggots, which are a major dietary source of protein, appear during the biodegradation of chicken droppings using house flies. The objective ofthe present study was to investigate the effect of maggot supplementation on the meat quality and growth performance of broiler chickens. A total of 600 one-day-old male commercial broiler chicks (Ross) were randomly assigned into 5 treatment groups consisting of 40 replicates of 3 birds. The birds were fed either a basal diet or the basal diet supplemented with 5.0, 10.0, 15.0 and 20.0% maggots. Overall, broiler chicken performance was influenced by the optimal amino acid profile; high protein (63.99%) and essential amino acid content (29.46%), or high protein digestibility (98.50%) of the maggots. Maggot supplementation caused linear increases in live weight gain but not the feed conversion ratio. The diets of 10 and 15% maggots was the most efficient in terms of average weight gain forthe 4-5 week old broiler chickens (p<0.05). It also significantly increased dressing percentage, breast muscle, and thigh muscle (p<0.05). No differences were observed forliver abdominalfat, or meat color, and the crude protein contents of breast muscle were constant. However, in the maggot-fed broilers, breast muscle lysine and tryptophan levels increased significantly as compared to the birds fed the basal diet (p<0.05). These results indicate that feeding diets containing 10 to 15% maggots in chicken dropping after biodegradation can improve the carcass quality and growth performance of broiler chickens.
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Affiliation(s)
- J Hwangbo
- National Institute of Animal Science, RDA, Suwon-441 706, South Korea
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Yang YX, Guo J, Yoon SY, Jin Z, Choi JY, Piao XS, Kim BW, Ohh SJ, Wang MH, Chae BJ. Early energy and protein reduction: effects on growth, blood profiles and expression of genes related to protein and fat metabolism in broilers. Br Poult Sci 2009; 50:218-27. [PMID: 19373723 DOI: 10.1080/00071660902736706] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
1. A total of 320-d-old Ross broilers were used in a 6-week study to investigate the effects of feeding lower energy and protein diets from d 8 to 14 on growth performance, blood profiles, and gene expression of leptin and myostatin. 2. Broilers were randomly allotted to 4 treatments, each treatment applied to 4 pens with 20 birds in each. During first week, all the birds were fed on a common starter diet (13.4 MJ ME/kg, 230 g/kg CP and 11.0 g/kg lysine). The birds were then subjected to their respective treatment diets from d 8 to 14. Treatment diets comprised two ME levels, 13.4 and 12.0 MJ/kg, each with two levels of CP, 230 and 184 g/kg. This was followed by feeding common starter and finisher diets for the last 4 weeks. 3. Dietary protein reduction resulted in poor performance and feed efficiency while energy reduction resulted in poor feed efficiency between d 8 and 14. From d 14 to 42 birds previously fed diets lower in energy and protein showed similar body weight gain and feed intake to well-fed birds. Moreover from d 8 to 14, birds fed on energy and protein-reduced diets had lower nutrient metabolisability coefficients. 4. The blood urea nitrogen (BUN) and relative weights of heart and breast muscle were lower in birds fed protein-reduced diets while energy reduction resulted in lower plasma glucose, abdominal fat and intestinal weight at d 14. At d 42, birds fed on the protein-reduced diets had lower BUN, breast muscle weight and small intestine length, while feeding on the energy-reduced diets resulted in lower abdominal fat. 5. Upregulated myostatin mRNA expression in breast muscle and downregulation of leptin mRNA expression in abdominal fat were observed in birds fed on protein and energy-reduced diets, respectively. 6. In conclusion, early nutrient reduction affected growth performance and produced lesser abdominal fat in broilers. Moreover, early energy and/or protein reduction could change muscle and fat metabolism by regulating the expressions of myostatin and leptin.
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Affiliation(s)
- Y X Yang
- College of Animal Life Sciences, Kangwon National University, Chuncheon, Republic of Korea
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Jang HY, Kim YH, Kim BW, Park IC, Cheong HT, Kim JT, Park CK, Kong HS, Lee HK, Yang BK. Ameliorative Effects of Melatonin against Hydrogen Peroxide-Induced Oxidative Stress on Boar Sperm Characteristics and SubsequentIn VitroEmbryo Development. Reprod Domest Anim 2009; 45:943-50. [DOI: 10.1111/j.1439-0531.2009.01466.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Yang YX, Guo J, Jin Z, Yoon SY, Choi JY, Piao XS, Wang MH, Ohh SJ, Kim BW, Chae BJ. Effects of metabolizable energy and lysine restrictions on growth performance, blood profiles, and expression of myostatin and leptin genes in broilers. Can J Anim Sci 2009. [DOI: 10.4141/cjas08042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
To investigate the effects of metabolizable energy and lysine restriction on performance, and gene expression of leptin and myostatin, three hundred twenty day-old Ross broiler chicks were randomly allotted to four treatments. Birds were subjected to their respective diets comprising two levels of ME (3200; 2880 kcal kg-1) and two levels of lysine (1.10; 0.88%) during days 8 to 21. The dietary crude protein levels were reduced with the proportion to the lysine levels, while ratios of essential amino acids relative to lysine were similar for all diets. During restriction, weight gain, breast muscle and abdominal fat yield were lower in birds fed lysine-restricted diets. Relative myostatin mRNA abundance was increased in breast muscle of lysine-restricted birds, while expression of leptin mRNA in abdominal fat was downregulated by energy and lysine restriction. During realimentation, birds previously fed with energy and/or lysine-restricted diets had comparable performance as birds fed unrestricted diets. At day 42, energy and lysine restriction increased relative myostatin mRNA expression in breast muscle and birds previously fed diet restricted in both energy and lysine had the highest relative myostatin mRNA expression (energy × lysine interaction, P < 0.001). The relative leptin mRNA abundance was significantly lower in birds previously fed energy-restricted diets. These results indicated that early energy and lysine restriction from day 8 to 21 exhibited growth compensation during realimentation. In addition, myostatin and leptin mRNA expression in breast muscle and abdominal fat were modulated by nutritional treatments and were closely associated with changes in breast muscle yield and abdominal fat deposition. Key words: Metabolizable energy, lysine, myostatin, leptin, broiler
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Park YK, Kim BW, Wang HJ, Kim MW. Auxiliary partial orthotopic living donor liver transplantation in a patient with Wilson's disease: a case report. Transplant Proc 2009; 40:3808-9. [PMID: 19100498 DOI: 10.1016/j.transproceed.2008.07.128] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2008] [Accepted: 07/02/2008] [Indexed: 11/29/2022]
Abstract
A patient with end-stage liver cirrhosis and neurological disorder due to Wilson's disease (WD) underwent auxiliary partial orthotopic liver transplantation (APOLT) using a living donor. He first visited our institute complaining of hand tremor, which was diagnosed as WD. Despite medical therapy, hepatic impairment progressed toward portal hypertensive complications. He was considered a suitable candidate for living donor-related liver transplantation. However, because of the impossibility of mobilization of the lateral section due to severe splenomegaly at the time of the recipient operation, we performed an APOLT using a right lobe graft. After transplantation, he suffered hepatic vein stenosis and biliary stenosis, receiving interventional therapy. The remnant native liver volume decreased, and the volume of the graft increased serially after transplantation. At the time of reporting, the patient had a normal working life with normal serum ceruloplasmin level and without neurologic problems at 26 months posttransplantation. APOLT may be a therapeutic option for patients with WD.
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Affiliation(s)
- Y K Park
- Department of Surgery, Ajou University School of Medicine, Suwon, Korea
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Park J, Lee W, Kim M, Lee HW, Kim BW, Choi YJ, Shin HJ, Chang JS, Cho GJ. A Case of Primary NK/T Cell Lymphoma of the Testis. Korean J Hematol 2008. [DOI: 10.5045/kjh.2008.43.4.276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Jinsup Park
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
| | - Won Lee
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
| | - Mihyun Kim
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
| | - Hye Won Lee
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
| | - Bo Won Kim
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
| | - Young Jin Choi
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
| | - Ho jin Shin
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
| | - Joo Seop Chang
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
| | - Goon Jea Cho
- Department of Internal Medicine, College of Medicine, Pusan National University, Busan, Korea
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Jeong GS, Kim BW. The influence of light/dark cycle at low light frequency on the desulfurization by a photosynthetic microorganism. J Biosci Bioeng 2005; 87:481-8. [PMID: 16232502 DOI: 10.1016/s1389-1723(99)80097-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/1998] [Accepted: 01/19/1999] [Indexed: 10/18/2022]
Abstract
H2S dissolved in water can be converted to elementary sulfur or sulfate by the photosynthetic bacterium Chlorobium thiosulfatophilum. The effects of the light/dark cycle on cell growth and the rate of sulfide removal were investigated to develop an appropriate fermentation strategy. Dark fermentation was also studied without addition of H2S and CO2 as electron and carbon sources. Average specific growth rates of bacterial cultures with a continuous supply of H2S and CO2 both in light and dark conditions were occurred in the range of 0.008 to 0.009 h(-1), indicating little dependence on the light/dark cycle, but about 25% of the growth rate that was occurred only in the presence of light. Average H2S removal capacities for cultures grown under the light/dark cycles of 14/10 , 12/12 , and 9/15 h, respectively, with a continuous supply of feed gases, were 0.08, 0.07, and 0.04 micromol H2S.min(-1)/mg protein.l(-1) in the dark, and was slightly less than those in the light. H2S removal capacity with variation of the light/dark cycle was about 30-60% of that obtained in the continuously illuminated cultures. ATP concentration in the dark decreased from 0.43 to 0.37 mg ATP.mg protein(-1) as the daily dark duration decreased from 15 to 10 h. The production rate for lactic acid from a culture grown without a supply of mixtures of H2S and CO2 gases was 0.218 g lactic acid.l(-1).h(-1), much more than that grown with a supply of feed gas mixtures. Time-averaged concentrations of lactic acid produced overall during the light and dark periods were 13.7 g lactic acid.l(-1) during the light/dark cycle of 14/10 h without a supply of feed gas, and 3.1 and 2.4 g lactic acid.l(-1) during the cycles of 9/15 and 14/10 h, respectively, with a supply of feed gas.
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Affiliation(s)
- G S Jeong
- Department of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Korea
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35
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Kim BW, Daniels GH, Harrison BJ, Price A, Harney JW, Larsen PR, Weetman AP. Overexpression of type 2 iodothyronine deiodinase in follicular carcinoma as a cause of low circulating free thyroxine levels. J Clin Endocrinol Metab 2003; 88:594-8. [PMID: 12574186 DOI: 10.1210/jc.2002-020921] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Thyroid function is normally undisturbed in patients with thyroid carcinoma. We have identified three patients with large or widely metastatic follicular thyroid carcinoma who had a persistently increased ratio of serum T(3) to T(4) in the absence of autonomous production of T(3) by the tumor. To investigate the possibility of tumor-mediated T(4) to T(3) conversion, we assayed types 1 and 2 iodothyronine selenodeiodinase (D1 and D2) activity in a 965-g follicular thyroid carcinoma resected from one of these patients. The V(max) for D2 was 8-fold higher than in normal human thyroid tissue. Resection of this tumor, leaving the left thyroid lobe intact, normalized the serum T(3) to T(4) ratio. In two other patients, treatment with sufficient levothyroxine to suppress TSH was associated with a high normal T(3) and a subnormal free T(4) index. In one, concomitant administration of the D1 inhibitors, propylthiouracil and propranolol, did not decrease the elevated serum T(3) to T(4) ratio. These data illustrate that increased T(4) to T(3) conversion in follicular thyroid carcinomas, probably by D2, can cause a significant perturbation in peripheral thyroid hormone concentrations.
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Affiliation(s)
- B W Kim
- Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA
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Rue SW, Kim BW, Jun DY, Kim YH. Nucleotide sequence and cell cycle-associated differential expression of ZF5128, a novel Kruppel type zinc finger protein gene. Biochim Biophys Acta 2001; 1522:230-7. [PMID: 11779640 DOI: 10.1016/s0167-4781(01)00337-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The nucleotide sequence of the ZF5128 gene, encoding a novel Kruppel type zinc finger protein, has been determined. The ZF5128 gene has a predicted 553-amino acid open reading frame, encoding a putative 61 kDa zinc finger protein. The N-terminus of the ZF5128 coding region has a well-conserved Kruppel-associated box (KRAB) domain that consists of KRAB box A and B, whereas the C-terminus contains a Kruppel type C2H2 zinc finger domain possessing nine C2H2 zinc finger motifs in tandem arrays with the highly conserved space region of the H/C-link. Each C2H2 zinc finger motif has a typical consensus sequence of CX2CX3FX5LX2HX3H. A 3.2 kb transcript specific for ZF5128 was expressed at high levels in the spleen, thymus, and peripheral blood leukocyte, and weakly expressed in the prostate, ovary, small intestine, colon (mucosal lining), placenta, lung, and pancreas. Although there was no detectable ZF5128 mRNA in unstimulated human peripheral T cells, it was first detectable 1.5 h after activation by anti-CD3 plus anti-CD28, and reached a maximum in 25-30 h. During the cell cycle progression of Jurkat T cells, the expression of ZF5128 mRNA appeared to be induced in G1 and reached a maximum in the S phase, but declined as the cells entered the G2/M phase. The 12-O-tetradecanoylphorbol 13-acetate-induced monocytic differentiation of U937, which also resulted in growth arrest, down-regulated the expression of ZF5128 mRNA. Taken together, these results indicate that ZF5128 is a novel gene encoding a Kruppel type C2H2 zinc finger protein and is regulated at the transcriptional level depending on tissue type and the cell cycle status to support cell proliferation.
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Affiliation(s)
- S W Rue
- Department of Microbiology, College of Natural Sciences, Kyungpook National University, 702-701, Taegu, South Korea
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Abstract
Hypermethylation of CpG island is a common mechanism for the inactivation of tumor-related genes. In the present study, we analyzed 13 genitourinary cancer cell lines for aberrant DNA methylation of 5 tumor-related genes using methylation- specific polymerase chain reaction (MSP). GSTP1 was methylated in 5 (38.5%), E-cadherin in 1 (8%), VHL in 1 (8%), and MGMT and hMLH1 in none (0%). Six out of thirteen genitourinary cancer cell lines had methylation of at least one of five genes; 5 had one gene methylated, and, 1 had two genes methylated. Methylation of these 5 genes was not detected in any of the bladder cancer cell lines. GSTP1 was methylated in all of the 3 prostate cancer cell lines. We conclude that aberrant hypermethylation may be an important mechanism for the inactivation of cancer-related genes in kidney and prostate cancer cell lines.
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Affiliation(s)
- W B Chung
- Department of Dental Microbiology, College of Dentistry, Kyungpook National University, Taegu, Korea.
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Abstract
Previously, we demonstrated that excision of the GnRH first intron (intron A) was largely attenuated in non-GnRH-producing tissues but accelerated in GnRH neurons. In the present study, we examined the splicing rate of GnRH pre-mRNA in developing normal mice and adult hypogonadal mice. The preoptic area and cerebral cortex were removed from mice at ages 1-7 wk. GnRH pre-mRNA splicing was examined by competitive RT-PCR using a variety of primer sets. The ratio of mature mRNA to intron A-containing RNA species in the preoptic area was lowest in 1- and 2-wk-old mice, significantly augmented in 3-wk-old mice, and further increased until adulthood. In contrast, the ratio of mRNA to intron A-containing RNA in the cerebral cortex was extremely low, drastically decreased in 3-wk-old mice, and remained at low levels until adulthood. These data indicate a preoptic area-specific increase in intron A excision during development. Intron B or C excision in the preoptic area was not significantly changed during development. To elucidate the possible involvement of the exonic splicing enhancers located in GnRH exons 3 and 4 in the developmental increase in intron A excision, we examined the splicing rate of GnRH pre-mRNA in hypogonadal mice whose GnRH exons 3 and 4 were truncated. The intron A excision in the preoptic area of hypogonadal mice was significantly lower than that of normal mice but similar to that in other tissues, such as cerebral cortex and olfactory bulb. To support the functional relevance of intron A-containing RNA species, we examined the translation efficiency of intron A-containing RNA. Insertion of intron A sequence into the upstream portion of the luciferase open reading frame significantly decreased translation efficiency. The present study demonstrates that intron A excision in the preoptic area is developmentally regulated in normal mice but largely attenuated in hypogonadal mice, indicating the functional importance of intron A excision in GnRH pre-mRNA splicing.
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Affiliation(s)
- J Y Seong
- Hormone Research Center, Chonnam National University, Kwangju 500-757, Korea
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Kim BW, Cho SH, Rha SE, Choi H, Choi KY, Cha SB, Choi MG, Chung IS, Sun HS, Park DH. Esophagomediastinal fistula and esophageal stricture as a complication of esophageal candidiasis: a case report. Gastrointest Endosc 2000; 52:772-5. [PMID: 11115916 DOI: 10.1067/mge.2000.108922] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- B W Kim
- Division of Gastroenterology, Department of Internal Medicine and Radiology, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Abstract
Biological desulfurization using C. thiosulfatophilum has many more advantages over conventional physico-chemical methods due to low operational cost and no production of secondary pollutants. However, it requires effective and economical supply of light energy, which is a key factor in determining the success of commercialization. In this study, optical-fiber photobioreactor with internal illumination system was applied to increase the light availability. Furthermore, sunlight was used as the main light energy in the daytime and metal-halide lamp was applied as an additional light energy at night. Most UV light was eliminated by the chromatic aberration of the aspherical lenses in the solar light collector and 60% of infrared light intensity was eliminated. Physical scratching optical fibers enhanced the light availability about five times as much as that with unscratched ones in the previous study, but it resulted in the adsorption problem of elementary sulfur particles deteriorating light diffusivity considerably in a long operation. In order to solve this problem, scratched optical fibers were inserted into pyrex-glass tubes, which made light diffusivity nearly the same as that without glass tubes. Removal rate per unit cell concentration, using sunlight in the daytime and a metal-halide lamp at night, was 0.41 <0.73 micromol H(2)S min(-1)/(mg protein l(-1)) using a 400 W metal-halide lamp day and night, since the automatic sunlight collection system can transmit the light intensity as only 10% of that with a metal-halide lamp.
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Affiliation(s)
- J Y An
- Department of Chemical Engineering, Sung Kyun Kwan University, 440-746, Suwon, South Korea
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Lee MC, Kim BW, Kim JS, Lee JS, Kim KS, Lee JH, Nam JH, Rowe SM, Kim SU. Neuronal differentiation of human neuroblastoma SH-SY5Y cells by gangliosides. Brain Tumor Pathol 1998; 14:5-11. [PMID: 9384796 DOI: 10.1007/bf02478862] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Exogenous administration of gangliosides induced neuronal differentiation with prominent neuritogenesis in human neuroblastoma SH-SY5Y cells in vitro. Neuritogenesis was characterized by ruffling of the cell membrane, the development of lamellipodia and filopodia, and the subsequent elongation and branching of the neurites ultrastructurally. Both axons and neurites were identified. Increased numbers of cell organelles in the neurites and cell bodies were noted. Nonsynaptic contacts and gap junctions formed between neurites or between each neurite and cell body. These findings could be implicated in histopathologic changes from neuroblastoma to ganglioneuroblastoma.
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Affiliation(s)
- M C Lee
- Department of Pathology, Chonnam National University Medical School and Medical Center, Kwangju, Korea
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Choi JI, Schifferle RE, Yoshimura F, Kim BW. Capsular polysaccharide-fimbrial protein conjugate vaccine protects against Porphyromonas gingivalis infection in SCID mice reconstituted with human peripheral blood lymphocytes. Infect Immun 1998; 66:391-3. [PMID: 9423888 PMCID: PMC107916 DOI: 10.1128/iai.66.1.391-393.1998] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The effect of immunization with either a Porphyromonas gingivalis fimbrial protein, a capsular polysaccharide, or a capsular polysaccharide-fimbrial protein conjugate vaccine were compared in hu-PBL-SCID mice. A significantly higher human immunoglobulin G antibody response and the highest degree of in vivo protection against bacterial challenge was observed in the group immunized with the conjugate vaccine. It was concluded that capsular polysaccharide-fimbrial protein conjugate from P. gingivalis could potentially be developed as a vaccine against periodontal infection by P. gingivalis.
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Affiliation(s)
- J I Choi
- Department of Pediatrics, University of Rochester, New York 14642, USA.
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Kim BW, Majerfeld A. Analysis of ionized-impurity-scattering relaxation time and mobility by the phase-shift method for two interacting valence bands. Phys Rev B Condens Matter 1995; 51:1553-1561. [PMID: 9978871 DOI: 10.1103/physrevb.51.1553] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Higgins MJ, Smilinich NJ, Sait S, Koenig A, Pongratz J, Gessler M, Richard CW, James MR, Sanford JP, Kim BW. An ordered NotI fragment map of human chromosome band 11p15. Genomics 1994; 23:211-22. [PMID: 7829073 DOI: 10.1006/geno.1994.1479] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
An ordered NotI fragment map containing over 60 loci and encompassing approximately 17 Mb has been constructed for human chromosome band 11p15. Forty-two probes, including 11 NotI-linking cosmids, were subregionally mapped to 11p15 using a subset of the J1-deletion hybrids. These and 23 other probes defining loci previously mapped to 11p15 were hybridized to genomic DNA digested with NotI and 5 other infrequently cleaving restriction enzymes and separated by pulsed-field gel electrophoresis. Thirty-nine distinct NotI fragments were detected encompassing approximately 85% of the estimated length of 11p15. The predicted order of the gene loci used is cen-MYOD1-PTH-CALCA-ST5-RBTN1-HPX-HBB-RRM1 -TH/INS/IGF2-H19-CTSD-MUC2-DRD4-HRAS - RNH-tel. This map will allow higher resolution mapping of new 11p15 markers, facilitate positional cloning of disease genes, and provide a framework for the physical mapping of 11p15 in clone contigs.
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Affiliation(s)
- M J Higgins
- Department of Human Genetics, Roswell Park Cancer Institute, Buffalo, New York 14263
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Craig CH, Kim BW, Rhyner PM, Chirillo TK. Effects of word predictability, child development, and aging on time-gated speech recognition performance. J Speech Hear Res 1993; 36:832-841. [PMID: 8377495 DOI: 10.1044/jshr.3604.832] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
This study examined the interaction of acoustic-phonetic information with higher-level linguistic contextual information during the real-time speech perception process in child, young adult, and older adult listeners. Five age groups were studied: (a) young children ranging in age from 5 to 7 years, (b) older children aged 8 to 10 years, (c) young adults aged 18 to 23 years, (d) older adults aged 60 to 69 years, and (e) older adults aged 70 to 83 years. All subjects were presented with time-gated monosyllabic target words presented in sentence contexts containing contrasting levels of word predictability. Findings indicated that target word predictability influenced the timing and nature of the real-time recognition process including the listeners' use of initial word sounds. Predictability-high (PH) words were recognized earlier and with greater confidence than predictability-low (PL) words. PH recognition performance was more influenced by child development and aging than PL recognition performance. Older adult listeners required more PH-gated word stimuli to produce accurate responses than younger adults. Older children showed more effective use of PH contexts than younger children.
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Affiliation(s)
- C H Craig
- Department of Communication Sciences and Disorders, University of Milwaukee, WI 53201
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Abstract
Quantitative cytology was performed in nasal secretions of normal control (NC), seasonal allergic rhinitis in season (SAR), perennial allergic rhinitis (PAR), chronic sinusitis with mucoid secretion (MS), and chronic sinusitis with mucopurulent secretion (MPS). The majority of inflammatory cells were neutrophils in NC, MS, and MPS; the majority were eosinophils in SAR and PAR. The concomitant appearance of inflammatory cells in nasal secretions was found, i.e., there were significant correlations between neutrophil and eosinophil counts in MPS, and between eosinophil and basophil counts in SAR. The eosinophil/neutrophil ratio was more than 0.1 in SAR and PAR, but the ratio was less than 0.1 in all NC, all MPS, and in 93% of MS; this indicates that 0.1 in eosinophil/neutrophil ratio is the critical value between allergic and nonallergic nasal diseases.
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Affiliation(s)
- H S Lee
- Department of Otorhinolaryngology, Mie University School of Medicine, Tsu, Japan
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Abstract
A NotI end clone library has been constructed from a human-hamster hybrid cell line containing only human chromosome 11. Fifty-one NotI clones were chosen to characterize the library. The majority of NotI clones hybridize to small 15- to 200-kb fragments and have proven to be valuable for chromosome 11 physical mapping by detecting fragments not previously recognized by random probes. These NotI end clones have been used to isolate corresponding NotI linking cosmids which were then used to identify adjacent NotI fragments on pulsed-field gels. The clones were mapped using fluorescence in situ hybridization and a somatic cell hybrid panel. Although these clones were localized over the entirety of chromosome 11, a nonrandom distribution was observed. Northern blot analysis indicated that 57% (17/30) of the NotI clones examined detected poly(A)+ transcripts in HeLa cell RNA.
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Affiliation(s)
- J Sanford
- Department of Human Genetics, Roswell Park Cancer Institute, New York State Department of Health, Buffalo 14263
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Kim BW, Chang HN. Removal of hydrogen sulfide by Chlorobium thiosulfatophilum in immobilized-cell and sulfur-settling free-cell recycle reactors. Biotechnol Prog 1991; 7:495-500. [PMID: 1367751 DOI: 10.1021/bp00012a003] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bioconversion of hydrogen sulfide to elementary sulfur by the photosynthetic bacterium Chlorobium thiosulfatophilum was studied in immobilized-cell and sulfur-settling free-cell recycle reactors. The cells immobilized in strontium alginate beads excreted elementary sulfur and accumulated it as crystal in the bead matrices, which made it possible that the reactor broth remained clear and the light penetrated the reactor deeper than with the free cells. In comparison with the free cells, the immobilized cells required 30% less light energy at a H2S removal rate of 2 mM/(L.h) and showed an activity of 2.4 times that of the free cells. However, in 40 h after the reaction the deterioration of the H2S removal efficiency became significant due to the accumulation of sulfur in the beads. The scanning electron micrograph (SEM) and energy-dispersive X-ray spectrometer (EDS) studies showed that the sulfur in the beads existed within a layer of 0.4 mm from the bead surface. In the sulfur-settling free-cell recycle reactor, about 80% of the sulfur excreted by the free cells could be removed in a settler. The 4-L fed batch reactor with the settler improved the light transmission to result in a H2S removal rate of 3 mumol/(mg of protein.h), 50% higher than that without it. The settling recycle reactor was much better in the removal of H2S than the immobilized-cell reactor because the former was a continuous system with the constant removal of sulfur particles by settling and of spent medium by supplying fresh medium at the same rate as the filtering rate of the reactor broth, while the latter was essentially a batch system where toxic metabolites and produced sulfur could not be removed.
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Affiliation(s)
- B W Kim
- Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, Taejon, Korea
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Abstract
To quantitatively analyze cellular elements in mucopurulent nasal secretions from patients with chronic paranasal sinusitis, we studied five mucus-liquefying agents--dithiothreitol (DTT), ethylenediaminetetraacetic acid tetrasodium salt, propylene glycol, serratio peptidase and urea--with Hanks' balanced salt solution used as a control. Agents were compared for the number of cells, the mucus-liquefying effect and the staining characteristic of cells in cytocentrifuge-prepared smears. The results indicated that the treatment of nasal secretions with 10 mM DTT provides more clear and detailed cytological preparations for quantitative cytology of nasal secretions.
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Affiliation(s)
- H S Lee
- Department of Otorhinolaryngology, Mie University School of Medicine, Japan
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Chae S, Igarashi M, Kim BW. Compensation of vertical vestibulo-ocular functions in squirrel monkeys after unilateral labyrinthectomy. Am J Otolaryngol 1990; 11:170-3. [PMID: 2382784 DOI: 10.1016/0196-0709(90)90033-r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Modifications in the vertical vestibulo-ocular reflex (VVOR) were studied in four squirrel monkeys (Saimiri sciureus) over time after unilateral labyrinthectomy. In the dark, with head upright, animals were exposed to sinusoidal rotation in the pitch plane. The magnetic field-pericorneal search coli technique was used to detect eye movement. The upward and downward slow-phase eye velocity (SPEV) of the VVOR and the maximum SPEV of the vertical component of spontaneous nystagmus (SPN) were studied. The mean preoperative gain of VVOR was symmetric. After unilateral labyrinthectomy, the maximum reduction of VVOR gain showed an asymmetry. The recovery of VVOR gain to the preoperative level took about 2 weeks, and the vertical component of SPN was present for about 3 weeks.
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Affiliation(s)
- S Chae
- Department of Otorhinolaryngology and Communicative Sciences, Baylor College of Medicine, Houston, TX
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